Granted Patent
Utility
US 5,736,613 · App. 08/605,133
Highly rigid propylenic resin and blow molded article made therefrom
Inventors:
Masato Kijima, Masayuki Shinohara, Minoru Sugawara, Koki Hirano
Patented Case
View Patent ↗
Granted: Apr 7, 1998
Filed: Mar 13, 1996
Inventors
Masato Kijima
Masayuki Shinohara
Minoru Sugawara
Koki Hirano
Assignee (at issue)
Idemitsu Petrochemical Co., Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.